HUNTSVILLE, Alabama--Sorry to burst your balloon, but this obscure national holiday is not intended as a roast of our fearless leaders.

On Presidential Joke Day, we reminisce on the knee-slappers told by U.S. Presidents during their times in office.

It began on August 11, 1984, as Ronald Reagan tested the microphone before his weekly Saturday radio address. President Reagan didn't realize the feed was live, and joked, " "My fellow Americans, I am pleased to tell you I just signed legislation which outlaws Russia forever. The bombing begins in five minutes."

Not known for their sense of humor, Soviet Union officials heard the broadcast and subsequently placed the military on high alert. Once tensions cooled and the threat of nuclear war subsided, the American public chuckled and paid tribute to the blunder with this foot-in-mouth tongue-in-cheek day.

Here are a few other wise cracks from our commander-in-chiefs:

"I only know two tunes. One of them is 'Yankee Doodle' and the other isn't." - Ulysses S. Grant

"Being president is like running a cemetery: you've got a lot of people under you and nobody's listening." - Bill Clinton

"You can fool some of the people all the time and those are the ones you want to concentrate on." - George W. Bush

"There is no pleasure in having nothing to do; the fun is having lots to do and not doing it."- Andrew Jackson

"When angry count to ten before you speak. If very angry, count to one hundred."- Thomas Jefferson

"I have often wanted to drown my troubles, but I can't get my wife to go swimming."- Jimmy Carter

"Do you realize the responsibility I carry? I'm the only person standing between Richard Nixon and the White House."- John F. Kennedy

Now, my fellow Americans, I ask you, who was the funniest U.S. President?